data class ImportResults(
    val sortedRules: SortedSet<ByteString>,
    val sortedExceptionRules: SortedSet<ByteString>,
    val totalRuleBytes: Int,
    val totalExceptionRuleBytes: Int,
  ) {
    fun writeOut(sink: BufferedSink) {
      with(sink) {
        writeInt(totalRuleBytes)
        for (domain in sortedRules) {
          write(domain).writeByte(NEWLINE)
        }
        writeInt(totalExceptionRuleBytes)